If you have thin or thinning hair, you’ve probably tried every volumizing shampoo and mousse on the market. But unless you’re addressing the root cause at — quite literally — the scalp, you’re not preventing future hair loss and the hair you do have will continue to get finer over time.

Fortunately, there’s a new brigade of thinning hair treatments that have hit store shelves in recent months. Some plump up individual hair strands while others protect your hair from heat and environmental stressors that lead to thinning. But they all have one thing in common: They nourish the scalp and, therefore, treat thinning hair.